Gearing



T. H. SIDDALL Feb. 24, 1931.

GEARING Filed Aug. 20, 1924 INVENTOR w; ATTORNEY Patented Feb. 24, 1931 UNITED STATES THOMAS HENRY SIDDALL, F SUMTER, SOUTH CAROLINA, ASSIGNOR TO SUMTER MA- PATENT OFFICE A CHINERYOOMPANY, OF SUMTEB SOUTH CAROLINA, A CORPORATION OF SOUTH CAROLINA emnme Application filed August 20, 1924." Serial No. 733,116.

My invention relates to improvements in gearing; especially gearing for the transmission of power, and adapted to enable a driveshaft to turn a driven shaft in opposite di rections at the will of the operator.

1 An object of this invention is to provide gearing comprising a controlling member so mounted and connected that it can be easily joined by ends E.

and advantageously actuated, with a small degree of movement to enable the driven shaft to be rotated in either a forward or reversedirection.

I The nature of the invention is set forth in the following description, and the character: istics defined in theappended claim; but I of course reservethe right to make changes that come within the scope and principle of my invention, as indicated by the broad mean ings of the terms in which the appended claim are expressed.

, On the drawings:

Figure l is a side view of gearing accord ing to my invention; in section on line 1--1 of Figure 2; a

Figure 2 is a top view of same;

Figures 3 and 4 are side views of the backing and forward connections, detached, of my improved gearing; and

Figures 5 and 6 respectively are end views of what is illustrated in Figures 3 and 4:.

The same numerals identify the same parts throughout.

The invention disclosed herein is similar to the construction shown in the specification of my United States Patent No.

1,160,537, granted November 16, 1915; and is designed chiefly forsawmill feed works, but isnot limited to such uses, as it may be employed for mechanical power transmission of any kind. I

In the drawings I show a supporting framework comprising longitudinal side beams A, etween the beams A is an intermediate longitudinal beam I, and mounted in bearings S afiixed to the frame is a transverse drive shaft M. On this shaft are secured a forward pulley F and a backing pulley B. The letter P represents the driven shaft, mounted in bearings S on the beam I and one of the beams A, and having fixed thereon pulleys F3 and B3 respectively cooperating with the pulleys F and B. On the shaft P is also fixed a gear 79, meshing with a gear G on a shaft D, which is mounted in; bearingsS on the beam I and the other beam A. A belt f runs over the pulleys F and F3, and another belt 6 runs over the pulleys B and B3. Belt 7) runs over the tops of the two pulleys B and 133, but the belt 7 runs from the bottom of the pulley F3 to topof the pulley F; hence these belts will turn the shaft 71 in opposite directions, according to which belt is causedjtotakc effect on the two shafts M and P. r

Associated with the pulley F is an idler pulley F2, mounted a little above the pulley F on a journal f2 in bearings F5 secured to the beams I and A, and below the pulley F is a tightening pulley 1 mounted on a journal j, This journal is secured to the ends of links C, between which the pulley F1 is received, and the links are pivotally mounted on a pinorjournal J, affixed to an extension X on thelower side of the beam I. Belt 7 runs from the top of pulley F2 to the top of pulley F3, then from the lower side of pulley F3 to thetop of pulley F, and thence to pulley F2 around thepulley Fl. To one of the links O is pinned at E a rod R1 joined by a bar B1 to a lever or controlling member L pivotally mounted on the beam I. Adjacent to this lever is a segment or plate S3 secured to the beam I, and having recesses N in its upper edge. The lever L carries a catch p1, sliding in perforated lugs Z on the lever, and pinned to a rod 7, pivotally attached at its upper end to a small bell-crank H pivoted to gage the selected notch N, and hold the lever in adjusted position. By pressing the small bell-crank I-I toward the lever F, the catch can be disengaged from the segment S, so that the lever L can be moved to adjust the pulley F1 to tighten or loosen the belt f as desired. The rod R1 and bar B1 may have a number of holes, and be united by one or more pins or bolts 51 '(with nuts) passing through these holes; see Figure 2; so that the connec-' tion of the rod and bar can be regulated: Between the backing pulleys B and B3, and engaging the lower side of the belt 7) are tightening pulleys Bland B2. These pulleys are mounted-to turn on journals Shilxed in the endsof links 13*, between whichthese pulleys are placed; and each link has a central journalBi which enters afrecess S2 of suitable shape in a mounting or angle plate B6. One of these plates is fastened to the inside and bottom of the beam A, shown at the bottom of Figure 2-; andthe other is fixed to the opposite face and-bottom of V the beam I.v On the journal S1 shown at the top ofvFigure'l is pivotally mounted a connecting box B7 joined by a rod or link lt to onefof the links C the box .137 and -'rod; or link B being adjustably connected to each other the; sameas the rod or link R rand bar B Hence motionofthe lever L will actuate not only the pulley F but also the pulleys B a-ndB .v I t v f As. plainly appearsfr o'm the. drawings, the

. looseningof the forward belt fwill tighten the belt b. Then-theshaitlll will turn the shaftsP and D. in'the backward directionl Loosening the belt Z) will tighten the vbelt f, and enable theishaift M to rotate. the shafts Pand D in. theiorward direction Either I I result isobta'ined'by a small movement of the lever L andua 'straightvmovementof the bar B andzthe rods R and R The belt?) runs from the lower side of the pulley B under the pulley B and then over the pulley B to the pulleyB and thus thebelt b,when

' reverse rotationof the shaltPis desired, is taken up and tightened by a straight pull at two points, making thecontrolefiicient and easy, and the same slight movement that tightens one beltinstantly loosenswand releases thezother. V

The two links B with the journals S1 carrying the 'pulleysB- and'B constitute a carrying member or frame for the tightening pulleys of the belt 6, so that the pulleys B and B can be'actuated as a single'unit. v

Pulleys B, B F, F and F are shown with flanges in Figure 1, but without flanges in the other views for the sake of clearness. Obviously flanges may be provided or omitted as desired. Also the belts do not appear in FiguresQ, 5 and 61to avoid concealing some I of V the par-ts. v

Figures 5 and 6 show all the moving mem bersor pulleys on Figures 3 and 4 as if seen i from the right, with the belts omitted. j The plates B6 are angle plates, and appear in Figure 5.as if detached and turnedto present the portions having the recesses S2; the-rema'ining yportions a being seen :edgewise. When these plates-are mounted, the portions hav ngthe; recesses fitagainst the. beams A and I, and the portions a under the beams, as in Figure 2. V

Havingdescribed myinvention what I believe to be new and desire to secure and pro tect by LettersPatent of the United States The combination of'a driving shaft, a

' driven shalt, a pulley on each of said shafts for actuating a belt in (a forward direction, a

pulley on eachof said shafts for actuating a belt in a reverse direction, a bel tconnecting the forward pulleys, a belt connecting'the backing pulleys, a pivoted member and a pair of idler pulleys to control the belt on the backing pulleys, said member lying transversely of said backing belt, an idler pulley associated with the forward pulley on the the driven shaft in either forward or reverse direction. o v v In testimony whereofl afllX my signature.

THOMAS HENRY SIDDALL. 

